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Method for preparing non-sintering self-insulating bricks by utilizing sludge, mineralized waste and construction waste

A technology of construction waste and mineralized waste, which is applied in the field of solid waste resource utilization and can solve the technical difficulty of sintering bricks and other problems

Active Publication Date: 2021-01-12
宁波纯力固废科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Mineralized garbage, sludge, and construction waste are different from traditional clay fired bricks in terms of raw material composition, and it is technically difficult to use them in fired bricks

Method used

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  • Method for preparing non-sintering self-insulating bricks by utilizing sludge, mineralized waste and construction waste
  • Method for preparing non-sintering self-insulating bricks by utilizing sludge, mineralized waste and construction waste
  • Method for preparing non-sintering self-insulating bricks by utilizing sludge, mineralized waste and construction waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The method for preparing non-sintering self-insulating bricks by using sludge, mineralized waste and construction waste specifically includes the following steps:

[0047] 1) Pretreatment: Take 90 parts by weight of modified sludge and 3 parts by weight of sea shell ash, and use sludge pump and powder pump to send to the sludge dryer, mix evenly, and then dehydrate and dry to make the dehydration rate of the sludge Reach 90%, repeat grinding and pass through 80 mesh sieve to get activated sludge;

[0048] 2) Wheel grinding: 100 parts by weight of activated sludge, 12 parts by weight of sea shell ash, 30 parts by weight of fly ash, 50 parts by weight of mineralized waste, 34 parts by weight of construction waste, and 15 parts by weight of clay , 5 parts by weight of the F14 activator and 30 parts by weight of water are input to the XLH-800 planetary wheel mill mixer for wheel milling and mixing, and the wheel milling time is 2min to become a mixture;

[0049] 3) Digesti...

Embodiment 2

[0057] The method for preparing non-sintering self-insulating bricks by using sludge, mineralized waste and construction waste specifically includes the following steps:

[0058] 1) Raw material preparation:

[0059] ① The sludge is taken from the sludge dehydration workshop of the local sewage treatment plant. The dehydration process mainly adopts the addition of CaO and FeCl 3 After stabilization, plate frame filter press is carried out, and the moisture content is controlled at 45%;

[0060] ② Fly ash is collected from the flue gas after coal combustion in local thermal power plants. It is dark brown and its chemical composition is shown in Table 1. The specific surface area of ​​fly ash reaches 486m 2 / kg, the density is 2.4g / cm 3 , the main mineral composition is SiO 2 (content 48.5%), Al 2 o 3 (content 20.23%) and CaO (content 7.31%);

[0061]③ The clay is taken from the surface soil of the local area. It is dried, ball milled and sieved before use. The particle s...

Embodiment 3

[0080] The method for preparing sinter-free self-insulating bricks from sludge, mineralized waste and construction waste includes: pretreatment, rolling, digestion, secondary rolling, molding, and maintenance, specifically including the following steps:

[0081] Pretreatment: Take 95 parts by weight of modified sludge and 5 parts by weight of sea shell ash, and use sludge pump and powder pump to send to the sludge dryer, mix evenly, and then dehydrate and dry, so that the dehydration rate of the sludge reaches 94% %, repeated grinding and passing through a 100-mesh sieve to obtain activated sludge; the mutual cooperation of various raw materials can remove the odor of the sludge, adjust the sludge to be neutral, and increase the calcium content in the sludge to promote sea shell ash Hydration progress, stimulate sludge activity;

[0082] Wheel grinding: the activated sludge of 110 parts by weight, the sea shell ash of 15 parts by weight, the fly ash of 45 parts by weight, the ...

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Abstract

The invention discloses a method for preparing a sintering-free self heat preservation brick from sludge, mineralized refuse and building waste. The method concretely comprises the following steps offirstly mixing and activating modified sludge and seashell ash to obtain activated sludge; then, performing wheel milling mixing on the activated sludge, seashell ash, fly ash, mineralized refuse, building waste, clay, F14 excitants and water; then, performing digestion; taking digestion materials, bonding agents, curing agents and polycarboxylate efficient water reducing agents to perform twice wheel milling to obtain blank materials; performing pressing to obtain a brick blank; sequentially performing pre-curing-normal temperature steam curing-high-pressure steam curing to obtain the self heat preservation brick. The method has the beneficial effects that the effective treatment and resource utilization problem of the dewatered sludge in a sewage treatment plant, mineralized refuse and building waste can be solved; the preparation method has the advantages that the process is simple; the cost is low; the intensity of the self heat preservation brick meets the building requirements; the heat preservation and thermal isolation effects are realized.

Description

technical field [0001] The invention relates to the field of utilization of solid waste resources, in particular to a method for preparing sinter-free self-insulating bricks by utilizing sludge, mineralized waste and construction waste. [0002] technical background [0003] At present, the construction industry is booming, and there is a huge demand for sintered bricks, and the country has banned the use and production of clay solid bricks, and the use of solid waste to make bricks has become a trend to replace clay bricks. After many years of domestic waste landfill, through physical, chemical, and biological reactions, the degradable substances are basically degraded completely, and the properties and components of the waste are relatively stable, forming a soil-like substance, which can be called mineralized waste. If this part of garbage can be mined for resource utilization, it will not only turn waste into treasure, but also expand the landfill capacity of the garbage ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00
CPCC04B28/00C04B2111/76C04B2201/20C04B2201/50C04B24/383C04B22/16C04B22/124C04B22/126C04B24/04C04B22/085C04B18/167C04B18/10C04B18/04C04B18/0418C04B14/28C04B18/08C04B14/10C04B2103/302C04B2103/0068
Inventor 卢开裕虞克夫张慧迪谢科平
Owner 宁波纯力固废科技有限责任公司
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